Audio speaker



FIG. 1 is a perspective view of an audio speaker, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is an opposite side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The dash-dash broken lines illustrate portions of the audio speaker that form no part of the claimed design. The dash-dot broken lines represent boundary lines that form no part of the claimed design. 

CLAIM The ornamental design for an audio speaker, substantially as shown and described. 